@misc{indiciaee92c7eb63498,
  title = {The empty delta sign.},
  author = {Satoru Yoshida and Mitsuo Shidoh},
  year = {2003},
  doi = {10.1212/wnl.60.1.146},
  url = {https://pubmed.ncbi.nlm.nih.gov/12525742/},
  note = {Source identifier: 12525742}
}